Centrifugal fluid-fuel burner



11 7 1927. e F. s. DENISON I CENTRIFUGAL FLUID FUEL BURNER .f/v VENTOB FREDER/ on J. DEN/J o/v I BYUGM Filed March 24, 1924 Patented June 7,1927.

UNITED TAT-113s- PATENT once. 2

FREDERICK s. naursorr, or mmunaroms, mmnnsora, Assreuoa r mmivnarous I HEAT REGULATOR comranx, or MINNEAPOLIS, MINNESOTA, A coarona'rrou or I MINNESOTA.

cniv'rmuean FLUID-FUEL BURNER.

Application filed March 24, 1924 Serial No. 701,480.

This invention relates to improvements in fluid fuel burners of the centrifugal type for the circumferential distribution of fluid fuel such, for example, as are known in the oil- 5 burning art. More particularly, this invention relates to such burners of the general type disclosedin applicants prior co-pending application Serial No. 698,109, filed March 10, 1924. In both cases, there is provided aburner of a com act unitary structure which is quiet and e cient in operation, the power consum tion is minimized, the moving parts are few and not liable to de-. rangement and may be conveniently balanced statically and dynamically with resultant minimizing of destructive vibrations and attendant noise. v

In the prior case, the fuel was forced from the fuel chamber by apump through a con-' duit which extended through a shaft to the,

distributing head. In the (present case, the shafting may be solid an the conduit is rovided outside the shifting and extend om the pump to the head and a valve may ll be interposed in the conduit at a conveniently accessible place to regulate the fuel passage. While the structural alinement of the axes of the head, motor and pump are pref-- erably retained in this present burner, it may be noted that the lower bearing hous-' ing for, the shafting is borne by the fuel chamber in the resent burner as distinguished from the caring shown in the prior application.

The object of this invention is to provide an improved fluid fuel burner of the centrifugal type. 7

Other objects of the invention will more fully appear from the following description and the accompanying drawings and will be pointed out in the annexed claims.

In the drawings there has been disclosed a structure designed to carry out the objects of the invention, but it is to be understood that the invention is not confined to the ex-' act features shown, as various changes may be made within the scope of the claims which follow.

In the drawings; v

Figure 1 is a vertical sectional view throu h the burner with the motor shown in full lines;

Figure 2 is a cross-sectional view on the line 2-2 of-Figure 1; and

Figure 3 is a cross-sectional view on the line 33 of Figure 1.

In the form ofthe invention disclosed in thedrawings, there isillustrated a centrifugal burner of the upri httype although with minor changes in earings, packing, 'etc., the burner may be used at different angles to the horizontal or vertical.

l The major parts of the structure are the distributing head, the shafting, the driving means (for example an electric motor), the pumping .means and the conduit leading rom the pumping means to the head.

The shafting 4 is preferably an integral structure although it may be lnade in two or more parts inaxial alinement for simultaneous actuation 'by the driving motor 5. While the motor may be supported upon the 'floor or other base 6, it is shown as supported by -the legs 7- upon the cover 8of the casing 9 which forms the chamber'for reception ,(5

of fuel such as the usual oil 11. The rotor of the motor is fixed in accordance with com-.

mon practice to the shafting for actuation of the latter and bearings maybe provided by the motor therefor as common. bearing, for one end portion of the shafting may be provided by the bearing housing 12 which may be carried by the chamber. As here shown such housing 12 is shown as integrally cast with the metal of the chamber cover, 8. For'convenience of terminology, this end portion of the shafting may be called the inner while the opposite end 7 portion may be referred to as the outer.

The distributing head is mounted upon the shafting' adjacent the outer end thereof. The head comprises a cap 13 and a channeled mem'ber14. The ca is fixed to the reduced end 15 of the sha ting and is adapted to rotate therewith. The channeled member 14 is substantially saucer-shaped with an in-' extending through the ca and received in threadedengagfment within recesses inlugs 19 integral wit the channeled member 14.

The chamber casing 9 is preferably of AlO' the skirt 28 annular y u per disk" 29. is mounted above. the

metal shaped inthe form shown provide an up r ofl'set recess wh ch is utilizedas a float-eh amber 21 forthe valve and float 22 which automaticall regulates the level of the oil in the cham' r casing 9 in the usualmanner. The oil-supply is received by the pipe 23, from a source not necessary to be shown, and after passing the float valve enters the float and main chambers.

The pumping means is here shown as ,of

the centrifugal variety and comprises a plucarried b thehub 25. As here shown, the

lower dis 27 is integral with the hub and extends with its peripheral edge in relatively close proximit to the inner face of depending from the bearing housing 12. The upper" disk 29 may be a separate member but is fixedly Secured to the hub and spaced from the lower disk so that the under face of the disk 29 abuts against the upper edge of the vanes 24. These two disks and vanes "rotate as a unit, and the upper disk 29 is of less diameter than the lower disk 27. In operation, the oil 11 enters between the rotating vanes by means of the apertures 31 in the lower disk and is outwardly thrown by the vanes to pass upwardlybeyond, the Preferably a third disk 32 upper rotating disk '29 in proximity thereto. This disk 32 is stationary and functions to overcome an tendency of the centrifugally forced oil to churn idl above the up er disk. The sta-. tionary isk 32*is 'pre erabl secured to the lower end of the axially epending annular shoulder 33 of the bearing housing 12.

A conduit is provided for the passage of the forced oil from the pumping meansto the distributing head. This conduit traverses the bearing housin an offset neck with interposed valve, an the piping. The earing housing 12 is provided with a Inrahty of outwardl and axially incllned bormgs to form t e passages 34 leading from the interior of the skirt 28 above the pump disks to an annular 'groove 35 in the housmg. The groove communicates with an outwardly inclined passage 36 axi-' ally bored in an elongated neck 37 which may be cast integrally with the housing 12.

TlllS passage 36 extends through the outer end of this neck and is threaded to receive in adwstable engagement a needle valve 38 which. may be held in the desired position by means of the lock-nut 39. A relative] short boss 41 is also formed upon the. outer ortion of the neck at an angle to its axis. 1s boss is also bored to provide a pas free ly through the head to deliver at tical flange'and within the head, and a pump sage 4.2 communicating with the neck-pas sage 36 sothat the position of the valve 38 may control the movement ofoil' through these passages. The boss 1s counter-bored and threaded to receive the end of'the pipe section 43 whichoutwardly extends around the motor 5 and may beheldfthereto by a packing nut 46 is received in threaded engagement therein.

In operation of the burner, the motor 18 energized to rotate the sha'fting whlch both rotates the distributinghead and the pumping means. .Oil, which'is maintained at a constant level in the chamber, enters the apertures-31 in the lower rotating disk and is radially thrown by the vanes 24 to pass beyond the stationary disk 32 whence it.

seeks its outlet by the passage v32 to the annular groove 35 then to the passage 36 through the valve 38, if open, to the pipe section 42 from the outer end of which the oil is discharged to the channel 16 of the head. Head-rotation develops the contrifugal force which causes the oil to travel I over the inclined inner face of the channeled member 14 and to be circumferentially distributed in a combustible form between the peripheral lips of the cap 13 and the channeled member 14.

- Having thus described my invention what y I claim as new and desire to secure by Letters-Patent, is:

1. A device of the class described comprising a reservoir base, having-a bearing in its top wall extending within the reservoir, a motor mounted above the reservoir base having a vertical shaft rotatable in the bearing, a hollow burner head upon the shaft having a'vertical flange defining an opening encircling the shaft, a conduit communicatin with the reservoir, leading through said bearing and including a pipe extending theinner side of the verwithin the reservoir base rotatable. by a shaft and adapted to deliver oil through the'conuit. v

2. A device of the class described comprismg a reservoir base provided with a bearing extension in its top wall, said extension having a terminal chamber within the reservoir and further having an upwardly extending passage communicating with the terminal y chamber, a motor abovethe reservoir having a shaft rotatable in the bearing extension, a hollow burner head upon the shaft above the motor having a flange defining an orifice opening of the burner aeeraoa passage.

3. A device of the class described comprising a reservoir base having a cover provided with a hub having a terminal chamber within the reservoir opening downwardly, a mo-' tor supported upon the cover and having a shaft extending through the hub and chamher, a stationary disk attached horizontally to the hub within the chamber, spaced disks secured to the shaft below and parallel with said stationary disk, with the bottom disk substantially close to the lower open side of the chamber, and having radial ribs and openings therebetween, a centrifugal burner head rotatable with the shaft and having a central flanged opening encircling the shaft, a fuel-delivery conduit extending-through the hub and laterally of'the motor, and a pipe communicating with said conduit and extending freely through the flanged opening of the burner head to deliver oil therewithin.

4. A centrifugal fluid fuel burner, including a reservoir base, a motor supported upon the base and having a shaft, a rotatable burner headvon the shaft above the motor,

arranged for horizontal distribution of the fuel in sheet form, disk fuel-pumping means on the shaft below the motor within the reservoir, and a fuel conduit communicating with the pumping means, and leading 11 wardly and outwardly therefrom around t e motor to discharge downwardly within the burner head.

in witness whereof, I have hereunto set my hand this 4th day of March, 1924.

FREDERICK S. DENI'SON. 

